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ATOMS - Coggle Diagram
ATOMS
History
J.J. Thomson
discovered the electron
Ernest Rutherford
discovered the atomic nucleus
Robert Milliken
oil drop experiment
used to measure electric charge
John Dalton
all matter is composed of atoms
atoms are indivisible
all atoms of the an element are the same
different elements had atoms with different sizes
Democratis
named the atom
atoms are specific to the material that they are composed of
elements
atomic number
number of protons
determines the element
found in the bottom left of the nuclide symbol
atomic mass
neutrons+protons
found in the top left of the nuclide symbol
nuclide symbol
represents the number of protons and neutrons
charge
difference of neutrons and protons
top left of the nuclide symbol
particles
neutrons
no charge
found in nucleus
protons
positive charge
found in nuclues
determines the element
electrons
negative charge
found in electron cloud